"How to say 'read a book' in English" can be simply translated as "To read a book". This phrase is commonly used and understood in the English-speaking world. If you want to emphasize the action of reading, you can use the verb form "to read", as in "I like to read books" or "She reads books every day". If you want to talk about the act of looking at and understanding written words, you can use the phrasal verb "to peruse", as in "He perused the novel carefully" or "They perused the contract before signing".
